Can we stop with the knee cap as being a proximate cause of Yelich's slump? It was a fracture of the knee cap. Nothing was shattered. He didn't even need surgical intervention or any serious medical treatment outside a knee immobilizer. More importantly, Yelich is 4th on the Brewers in sprint speed behind Garcia, Cain and Taylor. If his fractured knee cap was effecting him at the plate, you could bet that it would also impact his sprint speed. No - not when the mental component of that injury occurring while swinging in the batter's box is probably moreso a culprit to Yelich's change in approach than anything else. Also, sprint speed isn't affected by a healed broken bone. That injury occurred on a slider that started middle of the plate and broke way inside from a RHP - when you look at Yelich's lower swing % and probably more importantly the dramatic decrease in damage he's done with pitches middle-in since this injury, it's not hard to put 2 and 2 together why Yelich doesn't seem to want to attack those pitches by getting the bat out in front and hit them with authority to right field. Every player coming off an injury likely has some mental hurdles to jump in order to regain confidence in the injured area and trust that you aren't going to reinjure it. I had torn my ACL playing basketball and it took me abut 2 years to be comfortable again and not think about the knee every time I played. I play basketball in an old man league maybe once a week...Yelich is a professional athlete who is working with trainers and swinging a bat on a daily basis. I don't doubt that Yelich might have dealt with these mental side effects...and if he did, it likely was resolved during Spring Training 2020. He has taken so many swings since his injury there is just no way it still is impacting him...his back on the other hand is a more plausible factor